The Wicked witch of the West torments the Land of Oz and takes the courage of the lion, the brain of the scarecrow and the heart of the Tinman. A Tornado sweeps up Dorothy and Toto and takes them to Oz. Along the road, Dorothy meets three companions: a Scarecrow wanting a brain, a Tin Man wanting a heart, and a Cowardly Lion wanting courage.
The group travels through many dangerous situations until they reach the Emerald City and meet the Wizard, who agrees to help them only if they bring him the broomstick of the Wicked Witch of the West.

Dorothy defeats the Wicked Witch by accidentally melting her with a bucket of water.